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Coherent manipulation of nuclear spins using spin injection from a half-metallic spin source

机译:使用来自半金属自旋源的自旋注入相干操纵核自旋

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摘要

We have developed a nuclear magnetic resonance (NMR) system that uses spin injection from a highly polarized spin source. Efficient spin injection into GaAs from a half-metallic spin source of Mn-rich Co_2MnSi enabled an efficient dynamic nuclear polarization of Ga and As nuclei in GaAs and a sensitive detection of NMR signals. Moreover, coherent control of nuclear spins, or the Rabi oscillation between two quantum levels formed at Ga nuclei, induced by a pulsed NMR has been demonstrated at a relatively low magnetic field of ~0.1 T. This provides a novel all-electrical solid-state NMR system with the high spatial resolution and high sensitivity needed to implement scalable nuclear-spin-based qubits.
机译:我们已经开发了一种核磁共振(NMR)系统,该系统使用了来自高极化自旋源的自旋注入。从富锰Co_2MnSi的半金属自旋源向自旋注入GaAs进行有效的自旋注入可实现GaAs中Ga和As原子核的高效动态核极化,并能灵敏地检测NMR信号。此外,已经证明了在〜0.1 T的相对较低磁场下,核磁共振自旋的相干控制或在Ga核形成的两个量子能级之间的拉比振荡在相对较低的磁场(约0.1 T)下得到了证明。这提供了一种新颖的全电固态具有实现可扩展核自旋量子位所需的高空间分辨率和高灵敏度的NMR系统。

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